Gun safety mechanism



March 5, 1957 E. cLAi-issoN GUN SAFETY MECHANISM 7 Filed March 6. 1953 Lea 66 can Inventor .5. C

5: ED w v United States Patent GUN SAFETY MECHANISM Eric Claiisson, Huskvarna, Sweden, assignor to Husqvarna Vapenfabriks Aktiebolag, Huskvarna, Sweden, a corporation of Sweden 'Application March 6, 1953, Serial No. 340,757 3 Claims. (Cl. 42-41) The present invention relates to mechanisms for guns with hinged barrel, self-cocking hammer, scar, and a safety device which is automatically set into safety position when the gun is opened and closed. The invention has for its object to provide a simple and eflicient safety action in such guns. The safety device is adapted at the opening and closing of the gun automatically to occupy an inoperative position relative to the sear before the cocking of the hammer and thereupon a safety position locking the sear. By thus providing that the safety device cooperates with the sear, and not only with a trigger for the same, such inadvertent discharges are precluded as might happen by the sear loosing its eng-agement with the hammer under the influence of mass forces which may arise when the gun is dropped or else subjected to heavy shocks. This effective, automatic safety action is made possible thereby that the safety device before the cocking of the hammer is automatically set into a position non-locking the sear, another position than the unsafety position, whereby the sear is given a required freedom of movement during the cocking of the hammer. The automatic positioning of the safety device may by simple means be derived from a barrel locking bolt operatively connected with an opening lever.

The invention will be more particularly described with reference to the annexed drawing diagrammatically showing by way of example an application of the invention to an Anson-Deeley mechanism for a gun with a break down double-barrel. Fig. 1 is a longitudinal section through the mechanism, Fig. 2 a detail section corresponding to Fig. 1, Fig. 3 a more central longitudinal section, and Fig. 4 a plan view, partly in section, of the lower parts of the mechanism.

The mechanism shown comprises a frame 1 having a base 2 and a hinge 3 for the barrel 4. The latter is on its under side provided with locking lugs 5, 6 for cooperation with a locking bar 7 slidably mounted in the frame which bar on its under side, for instance, is provided with a slot 8 for an arm 9 upon a shaft 10 rotatably mounted in the frame. By means of an opening lever 11 positioned on top of the frame, said shaft may be turned laterally against the action of a leaf-spring 12 operating to keep the locking bar 7 in engagement with the lugs 5, 6. On each side of the locking bar there is a hammer 13 operated by a main spring 14 and by a cocking lever 15 pivoted on a pin 16 and adapted to be operated upon by the barrel for cocking the hammer when the barrel is being broken. Each hammer is pivoted on a pin 17 and provided with a shoulder 18 for the forward end 19 of a sear 20 which is pivoted on a pin 21, operated by a leaf spring 22 and, at its rear end, provided with a firing pin 23 in the path of movement of a trigger 25 pivoted on a pin 24. A safety bar 26 common to both hammers and arranged in the center plane of the mechanism may be slidable in its longitudinal direction in a bearing 27 on the frame base and, at its rear end, hingedly connected to a safety lever 29 ful- 2,783,569 Patented Mar. 5, 1957 crumed on a pin 28, said lever being at its upper end operatively connected with a thumb piece 30 slidably mounted on the tang of the frame. For maintaining the safety bar in safety and unsafety position, respec tively, a spring 31 mounted on the frame base may be adapted to cooperate with a pin 32 mounted in the safety bar.

In the embodiment shown the safety bar is on each side provided with a locking lug 33 which in the safety position of the safety bar shown in Fig. 1 is situated im mediately above the pin 23 of the sear, thus preventing a discharge movement of the sear. In the safety position the safety bar is situated between its forward unsafety position shown in Fig. 2 and a rear position inoperative relative to the sear and shown in Fig. 3, which position the safety bar should occupy during the cocking of the hammer. The automatic setting of the safety bar is accomplished by means of the locking bar 7 which is adapted, when moving from a barrel locking position to move the safety bar into its inoperative position, when returning to the locking position to move the safety bar into its safety position, and in the locking position to allow manual displacement of the safety bar between its safety and unsafety positions. In the embodiment shown the locking bar is thus at its rear end provided with a pair of claws 34 forming between them a recess for the forward end of the safety bar and a driver 35 mounted thereon which may be adjustable in the lOngi tudinal direction of the bar.

The claws 34 embrace the driver 35 with sudh a play in the movement direction of the bars that the safety bar by means of the piece 30 may be manually displaced between the safety position and the unsafety position, when the locking bar 7 is in its locking position shown in Figs. 1 and 2. If the gun is discharged and the locking bar is then, by means of the top lever 11, brought out of locking engagement with the lugs 5, 6, the locking bar will move the safety bar from the unsafety position in Fig. 2 into the inoperative position in Fig. 3, the locking lug 33 passing above the firing pin 23. If the barrel is thereupon broken down, the hammer will be cocked during a certain turning movement of the sear, the safety bar admitting such movement in its inoperative position. After the barrel has been closed, the locking bar is returned into its locking position by the spring 12, the claws 34 being thereby caused to engage the driver 35 and pull the safety bar into its safety position shown in Fig. 1. Also in case the safety bar initially is in this position, the same will evidently be automatically moved to the inoperative position and thereupon into the safety position when the gun is opened and closed. When the sear is not positively connected with its trigger, the safety bar is preferably provided with a locking lug 36 adapted to lock the trigger in the safety position of the bar and, possibly, also in its inoperative position.

In the embodiment shown the locking bar 7 is adapted, by the action of the spring 12 and the parts 34, 35, to return the safety bar 26 from the position shown in Fig. 3 into the safety position shown in Fig. 1. However, the parts 34, 35, may be omitted and said return movement be accomplished by a more direct spring action. To this end either of the parts 26, 29, and 30 may be operated by an additional spring urging the bar 26 to the left in Fig. 3 when it is to the right of its safety position. Alternatively, a spring performing the function of spring 31 may be provided with a cam portion situated in the path of a pin, such as 32, and likewise urging the safety bar to the left when it is to the right of its safety position. Such a spring 31a is denoted by dotted lines in Fig. 3, this leaf spring being secured to the unde side of the frame tang and provided with a 3 cam portion 31b sitnated in the path of a pin 32a mounted on a depending part of the piece 30 or, as shown, on the safety'lever 29. Also such a spring may be associated with either of parts 26, 29, and 30. Obviously, also other embodiments are possible within the scope-of the invention which may be applied to advantage also in other mechanisms than such of the type Anson-Deeley.

What I claim is:

1. In a gun, a frame, at least one barrel, a hinged connection between the barrel and the frame, a hammer movably supported by said frame, a movable sear mounted on said frame for engagement with said hammer, a cocking member actuated by turning the barrel on said hinged connection to cook the hammer into engagement with said sear, trigger means mounted on said frame for moving the sear to release the hammer to of feet firing, a barrel locking bar reciprooably supported by said frame and having a forward barrel locking position, an opening lever mounted on said frame and operatively connected with said locking bar to retract said locking bar rearwardly from its barrel locking position, a movable safety bar movably mounted on said frame for movement into a forward firing position, a median safety position blocking said sear against hammer releasing movement and a rearward inoperative position, said safety bar being situated behind said locking bar and directly engageable thereby so as to be moved rearwardly 2. A gun according to claim 1, wherein said meansincluding a spring includes a leaf spring shaped to define the safety position of said bar and having a portion to counteract the movement of said safety bar from said safety position into the inoperative position.

3. A gun according to claim 1, wherein the safety bar has a part engaging a recess in the locking bar with a play in the movement direction of the bars when the locking bar is in locking position corresponding to the movement of the safety bar between its safety position and its unsafety position.

References Cited in the file of this patent UNITED STATES PATENTS 44 1,3 95 Bye Nov. 25, 18 90 550,261 Ehbets Nov. 26, 1895 594,863 Elterich Dec. 7, 1897 1,054,069 Wilson Feb. 25, 1913 

